I have purchased a GL320 and would like to install an aftermarket upgrade audio system. (Currently installed command system)
Anyone knows how to connect aftermarket amps or a digital converter to the mos/fiberoptic audio gateway from mercedes?
I donīt want to lose the volume controls, but the speaker connection is not the best option for the best sound.
I have found several gadgets which conect to the fiberoptics ring and allow to integrate aux ports, input signals, etc, but none allows to get an audio line-level output from the system ( Or digital signal)
I am trying to find information on the audio-gateway wiring with no success.
Any information will be helpful.

Thanks in advance...